<html>
<head>
    <link rel="stylesheet" href="index.css">
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
    
    <div id="app">
        <p>{{ message }}</p>
        <button v-on:click="reverseMessage">Reverse Message</button>
    </div>

    <script src="index.js"></script>
</body>
</html>